0:00:00.160,0:00:04.480
three two one

0:00:04.560,0:00:08.000
go this is the video about the last

0:00:08.000,0:00:12.360
unsolved problem of climbing

0:00:14.120,0:00:17.199
ropes it's a deep dive into the science

0:00:17.199,0:00:19.720
behind robe development in and out in

0:00:19.720,0:00:22.960
and out and

0:00:24.519,0:00:28.080
testing including the microscopic world

0:00:28.080,0:00:31.800
of rope failures some new exciting

0:00:31.800,0:00:33.960
Technologies you do not

0:00:33.960,0:00:38.079
load the cut resistant fiber and me H

0:00:38.079,0:00:40.200
any any last

0:00:40.200,0:00:41.760
words

0:00:41.760,0:00:46.199
uh volunteering to do some human

0:00:46.199,0:00:50.120
testing nowadays ropes are almost

0:00:50.120,0:00:52.680
unbreakable so that's good for your fear

0:00:52.680,0:00:55.960
of falling but what we are about to

0:00:55.960,0:01:00.079
talk might not be so great yeah this is

0:01:00.079,0:01:03.879
a standard test of climbing

0:01:03.879,0:01:06.640
ropes a steel mass is dropped from

0:01:06.640,0:01:10.400
almost 5 m causing the forces more than

0:01:10.400,0:01:12.720
double of what you can achieve in real

0:01:12.720,0:01:16.040
life cuz it's unbreakable if you try to

0:01:16.040,0:01:18.920
literally break it if you pull on it

0:01:18.920,0:01:20.840
there is almost no chance that it will

0:01:20.840,0:01:24.200
snap no but first your back will

0:01:24.200,0:01:27.520
snap but when we talk about cutting I

0:01:27.520,0:01:29.920
was surprised that till this day there

0:01:29.920,0:01:32.799
there is no standard for how cut

0:01:32.799,0:01:35.399
resistant rope needs to be and it's not

0:01:35.399,0:01:38.320
that hard to cut the rope under tension

0:01:38.320,0:01:39.880
which means that there is no

0:01:39.880,0:01:42.680
standardized test which would measure

0:01:42.680,0:01:46.119
how good the Rope is against situations

0:01:46.119,0:01:48.560
like

0:01:48.840,0:01:51.680
this I mean it's not like no one worked

0:01:51.680,0:01:53.520
on it uh it's it's a really difficult

0:01:53.520,0:01:56.039
topic and a lot of institutes

0:01:56.039,0:01:58.280
manufacturers notified bodies and

0:01:58.280,0:02:01.360
Laboratories worked on that

0:02:01.360,0:02:03.880
now before we start breaking ropes a

0:02:03.880,0:02:07.200
quick detour to the 19th century the

0:02:07.200,0:02:10.080
early days of climbing with the best

0:02:10.080,0:02:12.360
advice you would get back then is that

0:02:12.360,0:02:16.000
the leader must not fall we used hemp

0:02:16.000,0:02:18.959
propes made for agricultural purposes

0:02:18.959,0:02:21.879
that had almost no stretch so if you

0:02:21.879,0:02:24.760
fall you either going to break your rope

0:02:24.760,0:02:30.720
or your ribs shall we go climbing

0:02:30.760,0:02:34.200
I brought some ropes brand new smells

0:02:34.200,0:02:36.599
organic want to take a whip on it are we

0:02:36.599,0:02:39.159
doing some uh test falls on

0:02:39.159,0:02:42.920
this not sure you want to now as you can

0:02:42.920,0:02:45.959
imagine these agricultural ropes didn't

0:02:45.959,0:02:49.200
had much quality control and that's why

0:02:49.200,0:02:50.280
in

0:02:50.280,0:02:54.000
1862 this serious looking Swiss man

0:02:54.000,0:02:56.640
decided to bring Swiss quality to

0:02:56.640,0:02:59.840
climbing ropes and here mammut was born

0:02:59.840,0:03:01.760
a year later followed by a German

0:03:01.760,0:03:05.080
company Eder and multiple Decades of

0:03:05.080,0:03:07.480
craziest

0:03:07.480,0:03:09.159
climbing

0:03:09.159,0:03:13.080
yeah now in 1935 everything started to

0:03:13.080,0:03:16.400
change when the chemical company dupond

0:03:16.400,0:03:19.599
invented nylon world's first synthetic

0:03:19.599,0:03:22.959
fiber yes boys this is it this is a

0:03:22.959,0:03:25.879
synthetic fiber you mean we make cloth

0:03:25.879,0:03:29.280
out of that yes we do actually to make

0:03:29.280,0:03:32.840
nylon you only need two components acid

0:03:32.840,0:03:35.360
and this thing that I cannot pronounce

0:03:35.360,0:03:37.080
so then I'm going to reach in here and

0:03:37.080,0:03:38.680
where the interface is I'm going to pull

0:03:38.680,0:03:43.080
out some nylon so here we go now we'll

0:03:43.080,0:03:44.799
see how much nylon we can pull out of

0:03:44.799,0:03:45.720
this

0:03:45.720,0:03:50.080
thing there's a meter or

0:03:50.080,0:03:54.319
so two so on a large scale this is done

0:03:54.319,0:03:56.079
not with a whole bunch of people doing

0:03:56.079,0:03:57.400
this of course

0:03:57.400,0:04:00.920
but by the way take a guess who was the

0:04:00.920,0:04:04.560
first user of such great

0:04:04.560,0:04:07.040
material certainly is a long time since

0:04:07.040,0:04:08.840
we've seen legs looking like that

0:04:08.840,0:04:10.200
perhaps I should say stocking was

0:04:10.200,0:04:13.120
looking like that that's right women

0:04:13.120,0:04:15.840
they love nylon stalking so much that

0:04:15.840,0:04:18.919
they gathered in crowds real Nyon and

0:04:18.919,0:04:21.600
fully fashioned very nice to see again

0:04:21.600,0:04:24.040
from any

0:04:24.120,0:04:27.960
angle and then World War II broke out

0:04:27.960,0:04:30.320
due to the conflict with Japan United

0:04:30.320,0:04:34.039
States lost access to Silk suppliers so

0:04:34.039,0:04:36.759
military needed to transition all silk

0:04:36.759,0:04:40.600
products like parachutes to nylon which

0:04:40.600,0:04:43.440
greatly accelerated development of nylon

0:04:43.440,0:04:47.199
but women felt the shortages but no

0:04:47.199,0:04:49.240
worries you can always paint legs to

0:04:49.240,0:04:52.039
look like they have stockings turned out

0:04:52.039,0:04:54.240
to be a great

0:04:54.240,0:04:57.120
business after the war nylon found its

0:04:57.120,0:05:00.639
way to Europe and mammut launched a rope

0:05:00.639,0:05:03.440
which can actually stretch but a year

0:05:03.440,0:05:06.000
later Eder invented the C mantle

0:05:06.000,0:05:09.919
technology which was an even bigger

0:05:09.919,0:05:11.840
Revolution it's a little bit funny

0:05:11.840,0:05:15.280
because a reed invented the kmle r the

0:05:15.280,0:05:17.400
owner of Mamud was not really convinced

0:05:17.400,0:05:20.039
by the New Concept he wanted to stick to

0:05:20.039,0:05:23.120
the Twisted one and just a couple years

0:05:23.120,0:05:25.400
later um M would also launch the first

0:05:25.400,0:05:27.960
ctal Rob so very quickly realized that

0:05:27.960,0:05:30.759
oh that's actually a good idea yes curl

0:05:30.759,0:05:32.600
mantle ropes are made out of two

0:05:32.600,0:05:35.160
components the core strands that are

0:05:35.160,0:05:37.680
twisted and the shift which is braided

0:05:37.680,0:05:39.919
around to protect the

0:05:39.919,0:05:43.080
core okay keep going keep going very

0:05:43.080,0:05:47.120
expensive rope with my uh with my hourly

0:05:47.120,0:05:49.919
pay okay so you have two different types

0:05:49.919,0:05:54.680
of spools here the red one run into this

0:05:54.680,0:05:57.479
direction by Red we mean this yeah the

0:05:57.479,0:06:00.520
red one go counter clockwise and the

0:06:00.520,0:06:04.720
yellow ones clockwise and they always go

0:06:04.720,0:06:07.960
in and out in and out in order to create

0:06:07.960,0:06:10.080
the

0:06:15.280,0:06:18.039
braid it's actually quite cool to see

0:06:18.039,0:06:20.840
this if you look at the core strands

0:06:20.840,0:06:23.360
from Modern climbing ropes they also

0:06:23.360,0:06:25.800
have this kind of twist this is like

0:06:25.800,0:06:29.000
exactly the same as this in theory yes

0:06:29.000,0:06:31.520
why is there many core strands and not

0:06:31.520,0:06:34.520
one big core strand Twisted together

0:06:34.520,0:06:36.520
that's a good question we have cores

0:06:36.520,0:06:38.800
that go in s direction that are twisted

0:06:38.800,0:06:41.400
in One Direction and other cores that

0:06:41.400,0:06:43.240
are twisted in the other direction this

0:06:43.240,0:06:45.199
is something that is a reoccurring theme

0:06:45.199,0:06:47.360
in the twines that are used in a rope

0:06:47.360,0:06:50.280
that you always differ the direction to

0:06:50.280,0:06:52.759
kind of work against the

0:06:52.759,0:06:56.000
natural uh motion of twisting now back

0:06:56.000,0:06:57.639
in the days when the military was

0:06:57.639,0:07:00.639
testing parachute deployment we noticed

0:07:00.639,0:07:04.080
that forces higher than 15g can result

0:07:04.080,0:07:07.240
in injuries to The Spine and Neck and

0:07:07.240,0:07:09.560
since climbers also don't like breaking

0:07:09.560,0:07:11.879
their backs they decided to borrow that

0:07:11.879,0:07:14.440
limit when the uiaa standard was

0:07:14.440,0:07:16.599
developed the developers back in the day

0:07:16.599,0:07:18.800
said it's impossible to reach the limit

0:07:18.800,0:07:21.479
of the 12 kons that is interesting that

0:07:21.479,0:07:23.599
at first we came up with the standard

0:07:23.599,0:07:25.599
that nobody could achieve and then only

0:07:25.599,0:07:28.360
later we managed to achieve it okay in

0:07:28.360,0:07:30.919
1964 we we got the first rope that is

0:07:30.919,0:07:35.440
certified to not break our backs and now

0:07:35.440,0:07:38.319
80 years later and we're still using the

0:07:38.319,0:07:40.720
same curl mantle technology which is

0:07:40.720,0:07:42.840
kind of impressive but what's not

0:07:42.840,0:07:45.840
impressive that till this day our ropes

0:07:45.840,0:07:48.639
still have the last unsolved problem

0:07:48.639,0:07:51.240
that they are not that hard to cut

0:07:51.240,0:07:53.720
especially when they are under tension

0:07:53.720,0:07:56.919
give me some sharpish objects sharp edge

0:07:56.919,0:08:01.440
object sharpish sharpish

0:08:03.159,0:08:04.280
oh

0:08:04.280,0:08:07.240
good but that's so

0:08:07.240,0:08:11.639
tiny this is dangerous this bringing a

0:08:11.639,0:08:14.879
knife and a file so we have a

0:08:14.879,0:08:18.479
file which is uh it's a metal file we

0:08:18.479,0:08:21.759
have a knife and this

0:08:21.759,0:08:25.319
thing in k no I will start with a dull

0:08:25.319,0:08:27.960
one and if it turns out to be too much

0:08:27.960,0:08:30.159
work I will go to sharper one so at

0:08:30.159,0:08:33.000
first we pull the Rope to 80 kg this

0:08:33.000,0:08:37.039
imitates a climber simply hanging on the

0:08:37.039,0:08:41.000
Rope oh wow it's not that hard to

0:08:41.000,0:08:42.560
cut

0:08:42.560,0:08:46.160
and yeah this file is not that sharp

0:08:46.160,0:08:48.070
kind of

0:08:48.070,0:08:51.219
[Music]

0:08:54.270,0:08:56.959
[Music]

0:08:56.959,0:09:01.160
scary no show

0:09:01.600,0:09:03.800
not as spectacular as you'd hit what I

0:09:03.800,0:09:06.720
want to actually now

0:09:10.800,0:09:13.760
try Okay significantly

0:09:13.760,0:09:15.920
harder yeah if it's like completely

0:09:15.920,0:09:18.560
relaxed

0:09:23.880,0:09:27.959
huh train you got really red

0:09:27.959,0:09:30.360
dude I just wanted to see how much

0:09:30.360,0:09:33.600
harder it is to cut not underload so

0:09:33.600,0:09:35.880
let's try what happens at

0:09:35.880,0:09:40.560
3.5 kons it's a hard fall load let's go

0:09:40.560,0:09:43.480
do I need the safety something you think

0:09:43.480,0:09:46.480
I'm going to die at three no no five

0:09:46.480,0:09:48.480
have you tried this before

0:09:48.480,0:09:52.000
no are you brave enough is the question

0:09:52.000,0:09:55.560
now my camera man is going

0:09:55.560,0:09:57.920
away you

0:09:57.920,0:10:01.839
ready yeah I'm

0:10:04.079,0:10:09.519
not it said something it wants to

0:10:12.839,0:10:16.880
talk let adjusting to the

0:10:22.000,0:10:25.399
weight it's War wow I'm barely barely

0:10:25.399,0:10:27.680
doing anything oh now be careful with

0:10:27.680,0:10:30.880
your fingers

0:10:33.390,0:10:37.920
[Music]

0:10:37.920,0:10:39.279
I think it

0:10:39.279,0:10:43.680
will wow I barely touched it so as you

0:10:43.680,0:10:46.000
can see tension in ropes plays a big

0:10:46.000,0:10:49.040
role in Cut resistance and now some of

0:10:49.040,0:10:51.320
you might be thinking why can't we

0:10:51.320,0:10:53.600
simply add some kind of material in the

0:10:53.600,0:10:55.839
Rope which would make them much harder

0:10:55.839,0:10:58.360
to cut well we do have ropes that are

0:10:58.360,0:11:01.440
made out of the Nema and aramite okay so

0:11:01.440,0:11:04.160
this is a glacier cord and where is it

0:11:04.160,0:11:06.560
used it's for securing yourself against

0:11:06.560,0:11:09.959
faults in a crass if you would fall in

0:11:09.959,0:11:11.920
there you have covered with snow so the

0:11:11.920,0:11:14.920
snow kind of dampens the Fall mhm so

0:11:14.920,0:11:16.920
this is why you don't need the Dynamics

0:11:16.920,0:11:19.440
in this type of rope this is a shoelace

0:11:19.440,0:11:22.680
yeah 6 mm is this dyo or yeah on the

0:11:22.680,0:11:25.399
inside it's a dyema on the outside it's

0:11:25.399,0:11:27.920
a polyester AR and this Glacier people

0:11:27.920,0:11:30.600
came up with a thought that it's okay to

0:11:30.600,0:11:33.800
fall on this well cuz you don't fall

0:11:33.800,0:11:36.760
well then don't use it so we put this

0:11:36.760,0:11:39.320
cord in a drop tower with relatively

0:11:39.320,0:11:41.440
small amount of slack and we wanted to

0:11:41.440,0:11:43.480
see what happens when you apply a

0:11:43.480,0:11:46.519
dynamic load on the super strong yet

0:11:46.519,0:11:49.040
stiff

0:11:49.040,0:11:52.120
material oh my God it's always so loud

0:11:52.120,0:11:55.720
in here what was the force 7.9 so what

0:11:55.720,0:11:58.000
force do you expect out of dynamic rope

0:11:58.000,0:12:01.959
on the same fall m I would say around

0:12:01.959,0:12:08.480
3.6 3.7 3.5 so 3.6 and 3.5 want to play

0:12:08.480,0:12:10.680
some bets what's your guess 3 kilon

0:12:10.680,0:12:13.920
Neons okay he's paying for

0:12:13.920,0:12:16.370
dinner no the closest one p for the

0:12:16.370,0:12:19.800
[Laughter]

0:12:19.800,0:12:22.530
dinner

0:12:22.530,0:12:23.839
[Music]

0:12:23.839,0:12:27.519
what okay so I'm playing for the dinner

0:12:27.519,0:12:29.560
so as you can see material which is

0:12:29.560,0:12:32.800
rated for 14 kiltons for a static

0:12:32.800,0:12:36.839
scenario broke at around 8 in a dynamic

0:12:36.839,0:12:40.160
drop which is a peculiar observation on

0:12:40.160,0:12:42.680
itself but that also shows that

0:12:42.680,0:12:44.600
incorporating these super strong

0:12:44.600,0:12:47.240
materials into Dynamic climbing ropes is

0:12:47.240,0:12:49.920
not that trivial now the second problem

0:12:49.920,0:12:51.920
comes from saying that if you can't

0:12:51.920,0:12:54.360
measure it you can't improve it and

0:12:54.360,0:12:56.440
turns out that measuring cut resistancy

0:12:56.440,0:12:59.199
in climbing ropes is a very tricky top

0:12:59.199,0:13:03.800
IPC in 2002 UAA proposed a test similar

0:13:03.800,0:13:06.519
to a standard drop test but here the

0:13:06.519,0:13:10.199
Rope was falling over a sharp edge but

0:13:10.199,0:13:12.600
the problem was the values that we got

0:13:12.600,0:13:14.480
or the values that they got back then

0:13:14.480,0:13:17.000
were just inconsistent within the test

0:13:17.000,0:13:18.760
but also between different institutes

0:13:18.760,0:13:21.399
and Laboratories so 2 years later the

0:13:21.399,0:13:24.440
test was withdrawn and since then a lot

0:13:24.440,0:13:26.800
of different tests were tried out by

0:13:26.800,0:13:29.120
different organizations and mammut also

0:13:29.120,0:13:31.760
also had their own idea it's a pendulum

0:13:31.760,0:13:34.320
swing with a sharp knife is dropped onto

0:13:34.320,0:13:38.040
a pre-loaded rope so instead of the Rope

0:13:38.040,0:13:40.120
falling with the weight you had rope

0:13:40.120,0:13:42.480
static and the knife was falling exactly

0:13:42.480,0:13:44.320
the knife was falling and you measured

0:13:44.320,0:13:46.320
how high the knife came after the

0:13:46.320,0:13:48.720
cutting and then you could calculate how

0:13:48.720,0:13:50.839
much energy was necessary to cut it so

0:13:50.839,0:13:53.120
we worked three years on that but at

0:13:53.120,0:13:54.920
some point we also had to say yeah it's

0:13:54.920,0:13:58.120
giving inconsistent values opened more

0:13:58.120,0:14:00.600
questions than now the common problem

0:14:00.600,0:14:02.839
with many of those tests were that

0:14:02.839,0:14:05.199
either the forces were unrealistically

0:14:05.199,0:14:08.079
high or the Dynamics in those test

0:14:08.079,0:14:11.079
introduced too much variability meaning

0:14:11.079,0:14:13.160
when the Rope is falling on some kind of

0:14:13.160,0:14:16.240
sharp edge it will never fall in exactly

0:14:16.240,0:14:20.360
the same way so in 2018 edet proposed a

0:14:20.360,0:14:22.880
slightly different approach where they

0:14:22.880,0:14:25.600
eliminated all the Dynamics here the

0:14:25.600,0:14:28.320
rope is tensioned to desired load and

0:14:28.320,0:14:31.320
then the discs spins and cuts the Rope

0:14:31.320,0:14:33.920
and the Machine is measuring how far the

0:14:33.920,0:14:37.279
disc had to travel to cut the rope in

0:14:37.279,0:14:40.279
2015 there was an accident where two

0:14:40.279,0:14:44.440
people were lowered on a single 8.7 mm

0:14:44.440,0:14:47.920
rope the Rope moved a bit over a sharp

0:14:47.920,0:14:51.440
edge and it was cut and since this test

0:14:51.440,0:14:53.680
reproduces the accident scenario really

0:14:53.680,0:14:56.480
well edet managed to answer a very

0:14:56.480,0:14:59.079
important question what had a bigger imp

0:14:59.079,0:15:01.440
impact in the accident the fact that

0:15:01.440,0:15:06.040
they used super thin 8.7 mm rope or that

0:15:06.040,0:15:08.759
they were lowered two people at the same

0:15:08.759,0:15:11.639
time first we loaded two different ropes

0:15:11.639,0:15:15.920
to 160 kg imitating two climbers hanging

0:15:15.920,0:15:18.199
and even though ropes had different

0:15:18.199,0:15:21.519
diameters the cut resistance was very

0:15:21.519,0:15:24.240
similar but then they took the same rope

0:15:24.240,0:15:27.399
but loaded it with different load and

0:15:27.399,0:15:31.040
this time the difference was much bigger

0:15:31.040,0:15:33.560
this shows that the load on the Rope has

0:15:33.560,0:15:36.600
a much bigger impact than the diameter

0:15:36.600,0:15:39.519
of the Rope so a great takeaway would be

0:15:39.519,0:15:41.720
to avoid practices where two people are

0:15:41.720,0:15:44.519
hanging on one strand of the Rope but at

0:15:44.519,0:15:48.319
the same time 160 kilos that we used is

0:15:48.319,0:15:50.600
not that much when we start talking

0:15:50.600,0:15:53.279
about Dynamic scenarios their forces can

0:15:53.279,0:15:55.079
reach up to 4

0:15:55.079,0:15:58.000
kons and also the cutting patterns

0:15:58.000,0:16:00.600
become way more more complicated

0:16:00.600,0:16:02.680
recently there was a very interesting

0:16:02.680,0:16:04.920
paper published which took ropes that

0:16:04.920,0:16:06.959
were cut and looked through the

0:16:06.959,0:16:09.639
microscope and what they found was four

0:16:09.639,0:16:12.480
dominating patterns the first one was a

0:16:12.480,0:16:15.519
clean cut the second one was a tiered

0:16:15.519,0:16:17.759
cut as if you would be cutting with a

0:16:17.759,0:16:20.040
dual knife then they found some

0:16:20.040,0:16:23.000
mushrooms these happened from high-speed

0:16:23.000,0:16:27.519
fiber overload and lastly molten fibers

0:16:27.519,0:16:29.440
and then we looked what p patterns they

0:16:29.440,0:16:32.480
will find in ropes cut by different

0:16:32.480,0:16:35.759
tests starting with ederly disc which

0:16:35.759,0:16:39.160
produced a lot of Clean Cuts but also a

0:16:39.160,0:16:41.720
lot of tiered Cuts this probably

0:16:41.720,0:16:43.920
happened because the disc actually has

0:16:43.920,0:16:47.319
these small teeth next they looked into

0:16:47.319,0:16:50.120
the old mammut test and this one was

0:16:50.120,0:16:52.920
pretty much dominated by mushrooms and

0:16:52.920,0:16:55.120
the possible explanation is because the

0:16:55.120,0:16:58.040
Rope was tensioned to unrealistically

0:16:58.040,0:16:59.560
high Force

0:16:59.560,0:17:01.240
and of course I had a question why

0:17:01.240,0:17:03.759
didn't we use more realistic loads on

0:17:03.759,0:17:06.720
this test when we lowered the preloading

0:17:06.720,0:17:10.720
to 3 4 Kon then uh some of these ropes

0:17:10.720,0:17:12.959
have not been able to be cut we were not

0:17:12.959,0:17:14.439
able to compare the results you wanted

0:17:14.439,0:17:16.559
that all the ropes will be cut but then

0:17:16.559,0:17:18.400
you can measure how much it takes that

0:17:18.400,0:17:20.760
was the difficulty of the test yeah okay

0:17:20.760,0:17:24.000
next we looked into the old uiaa test

0:17:24.000,0:17:26.839
and here we found a lot of mushrooms but

0:17:26.839,0:17:29.559
also a lot of molten fiber

0:17:29.559,0:17:32.200
and finally they simulated a realistic

0:17:32.200,0:17:34.919
Dynamic scenario where the Rope was

0:17:34.919,0:17:38.520
running across a sharp granite edge and

0:17:38.520,0:17:40.400
also they compar the patterns in

0:17:40.400,0:17:42.320
different parts of the Rope like The

0:17:42.320,0:17:45.559
Shift versus the core and after all the

0:17:45.559,0:17:48.880
analysis the study concluded that no

0:17:48.880,0:17:51.440
test method can fully replicate the

0:17:51.440,0:17:54.559
complex breaking mechanism observed

0:17:54.559,0:17:56.640
during an accident

0:17:56.640,0:17:59.799
simulation so yeah a deep rap hole but

0:17:59.799,0:18:03.640
this brings us to the best part of this

0:18:03.640,0:18:06.559
video ah fancy this thing can go up and

0:18:06.559,0:18:09.559
down yeah you don't like walking ladders

0:18:09.559,0:18:11.320
so you made the machine which goes up

0:18:11.320,0:18:15.559
and down Dano was climbing this Ladder

0:18:15.559,0:18:18.760
Up and Down millions of times it kind of

0:18:18.760,0:18:21.120
feels that it grabs the edge but it's

0:18:21.120,0:18:24.960
not like super cut yeah I mean I

0:18:24.960,0:18:27.799
wouldn't even think outside that this is

0:18:27.799,0:18:30.640
an issue there sever edges out in the

0:18:30.640,0:18:33.039
mountains that are much sharper than

0:18:33.039,0:18:36.600
this yeah so if we do the tests then you

0:18:36.600,0:18:38.919
will be afraid of climbing after

0:18:38.919,0:18:42.960
it here you have this 45° surface so

0:18:42.960,0:18:47.440
it's like 90° and then 45° cut yes cut

0:18:47.440,0:18:50.159
yeah yeah so it's not actually like a

0:18:50.159,0:18:53.200
pointy Edge it's relatively rounded Edge

0:18:53.200,0:18:56.520
but the granite has this roughness to it

0:18:56.520,0:18:59.480
yes I would say so let me get the reason

0:18:59.480,0:19:01.720
we cannot make this standardized is

0:19:01.720,0:19:03.360
because it's impossible to make this

0:19:03.360,0:19:07.360
granite edge standard like yeah so this

0:19:07.360,0:19:09.679
test setup is not something that aims to

0:19:09.679,0:19:11.760
be a standardized test method that needs

0:19:11.760,0:19:14.080
to be reproducible in different places

0:19:14.080,0:19:17.600
so you need that exact same granite edge

0:19:17.600,0:19:19.760
at in 10 different places this was not

0:19:19.760,0:19:21.159
the goal it was for us in the

0:19:21.159,0:19:24.159
development to learn how different

0:19:24.159,0:19:25.919
constructions are behaving thicker

0:19:25.919,0:19:28.159
diameters thinner diameters different

0:19:28.159,0:19:30.159
shth con instructions just to get an

0:19:30.159,0:19:38.080
insight for that okay ready 3 2 one and

0:19:41.880,0:19:45.679
go 1

0:19:46.159,0:19:48.840
go well I wouldn't want to be a climber

0:19:48.840,0:19:53.400
in this case Qui cut quiet cut that's a

0:19:53.400,0:19:59.640
quiet cut um 3 2 1 go

0:20:10.240,0:20:13.000
W and this one's friend holding

0:20:13.000,0:20:15.679
on yeah but it's just being pulled out

0:20:15.679,0:20:17.960
it's not holding anymore huh so you can

0:20:17.960,0:20:20.240
see where the cor strs were

0:20:20.240,0:20:23.320
cut we have one left it was completely

0:20:23.320,0:20:27.400
pulled out this is the original end and

0:20:27.400,0:20:30.679
you can see the whole that remains and

0:20:30.679,0:20:33.679
how hard is the fall what's the force to

0:20:33.679,0:20:36.120
the climber I would say it's a realistic

0:20:36.120,0:20:40.360
fall with realistic forces 3 kiltons or

0:20:40.360,0:20:41.600
300

0:20:41.600,0:20:45.120
kog all right our first rope was failing

0:20:45.120,0:20:47.880
very easily so we change to a thicker

0:20:47.880,0:20:55.400
one all right 3 2 1 go

0:20:58.650,0:21:03.400
[Music]

0:21:03.760,0:21:06.720
it's crazy cuz it looks like a tiny fall

0:21:06.720,0:21:09.799
and a tiny swing and it went yesterday

0:21:09.799,0:21:11.760
we basically spent the day breaking

0:21:11.760,0:21:15.520
ropes and yeah I I wouldn't have go

0:21:15.520,0:21:17.720
straight to the to the to the to the

0:21:17.720,0:21:20.480
Rock to climb because no wasn't the goal

0:21:20.480,0:21:22.520
to be the

0:21:22.520,0:21:25.039
opposite well it as a climber it kind of

0:21:25.039,0:21:27.159
scares you to see this a little yeah

0:21:27.159,0:21:29.600
that's that's true all right moving to

0:21:29.600,0:21:36.720
even thicker 9.9 mm rope 1

0:21:38.440,0:21:41.200
go wow that's quick you can see the

0:21:41.200,0:21:43.480
different types of cutting mechanisms

0:21:43.480,0:21:45.840
here first the chef has been cut and

0:21:45.840,0:21:48.320
then it kind of looks like the Rope is

0:21:48.320,0:21:51.000
remaining on one position but the load

0:21:51.000,0:21:52.640
is pulling more and more yeah you see

0:21:52.640,0:21:54.520
the cover the the course breaking one

0:21:54.520,0:21:58.600
after each other yeah so it's 3 seconds

0:21:58.600,0:22:01.080
for the whole rope to break it's quick

0:22:01.080,0:22:03.640
that's very quick mhm oh exciting so um

0:22:03.640,0:22:05.120
shall we

0:22:05.120,0:22:09.320
do okay let's do the thickest rope on

0:22:09.320,0:22:14.480
our list 3 2 one

0:22:15.960,0:22:20.240
go so I don't know who still buys such

0:22:20.240,0:22:21.400
monster

0:22:21.400,0:22:22.440
[Music]

0:22:22.440,0:22:27.279
ropes but I guess here you go that's for

0:22:27.279,0:22:30.520
your fear of fall fall ing the slow

0:22:30.520,0:22:33.039
motion

0:22:33.039,0:22:35.840
torture so yeah

0:22:35.840,0:22:38.840
subscribe and I promise that the Rope is

0:22:38.840,0:22:41.559
not going to

0:22:43.240,0:22:48.679
break come on the button is down

0:22:50.799,0:22:54.279
there we need

0:22:56.799,0:23:02.039
you thank you for subscribing you're the

0:23:07.159,0:23:10.240
best so as you can see while adding more

0:23:10.240,0:23:12.640
material and making the ropes thicker

0:23:12.640,0:23:16.400
does help a little bit it's not by much

0:23:16.400,0:23:18.000
and obviously mammut wouldn't be

0:23:18.000,0:23:19.960
inviting me just to show how all the

0:23:19.960,0:23:22.039
ropes are failing they actually been

0:23:22.039,0:23:24.679
working on something new ah so this is

0:23:24.679,0:23:27.919
the new row yes so it has an extra

0:23:27.919,0:23:30.640
something inside oh look at that I would

0:23:30.640,0:23:32.960
not even be able to guess that it's made

0:23:32.960,0:23:35.600
out of different material it feels also

0:23:35.600,0:23:40.559
kind of fabric soft I was thinking you I

0:23:40.559,0:23:43.480
will open this and we'll find some metal

0:23:43.480,0:23:46.279
inside no it's textile and the key

0:23:46.279,0:23:49.159
component is the intermediate Chief here

0:23:49.159,0:23:52.080
you have here a intermediate chief that

0:23:52.080,0:23:55.480
protects the core so normally ropes have

0:23:55.480,0:23:58.440
shift and then they have the core and

0:23:58.440,0:24:02.440
and this rope has one more sheath you

0:24:02.440,0:24:04.799
can say this intermediate sheath is made

0:24:04.799,0:24:08.400
of um high strength aramite fibers that

0:24:08.400,0:24:11.240
have an overlength so with this

0:24:11.240,0:24:15.120
overlength um they are free from tension

0:24:15.120,0:24:17.720
this is actually very interesting while

0:24:17.720,0:24:20.039
aramite is a super strong material

0:24:20.039,0:24:22.480
commonly used in safety equipment like

0:24:22.480,0:24:25.000
cut resistant gloves or bulletproof

0:24:25.000,0:24:28.480
vests however as we've seen before arite

0:24:28.480,0:24:29.679
is very

0:24:29.679,0:24:32.399
stiff so to solve this they needed to

0:24:32.399,0:24:35.080
create a design where nylon in the Rope

0:24:35.080,0:24:37.520
would stretch and absorb the impact but

0:24:37.520,0:24:40.760
aramide would stay without load this is

0:24:40.760,0:24:43.600
the so-called we call it the hybrid

0:24:43.600,0:24:46.840
Yan what is uh made of two different

0:24:46.840,0:24:50.080
fibers so this middle layer is not only

0:24:50.080,0:24:54.399
arite it's a hybrid yes okay and you see

0:24:54.399,0:24:56.720
that there is one with a longer yarn

0:24:56.720,0:25:00.760
inside yeah and one is sh okay so there

0:25:00.760,0:25:04.559
is two Thin strings one is completely

0:25:04.559,0:25:07.240
stretched now and the other one is

0:25:07.240,0:25:09.840
curled around the stretched one yes this

0:25:09.840,0:25:11.720
is the one with the over length if you

0:25:11.720,0:25:13.120
load it

0:25:13.120,0:25:15.399
now you do not

0:25:15.399,0:25:19.080
load the cut resistant fiber okay to

0:25:19.080,0:25:21.600
illustrate this is an elongation curve

0:25:21.600,0:25:24.720
of a pure nylon and this is a hybrid

0:25:24.720,0:25:28.360
yarn without an overlength so not good

0:25:28.360,0:25:31.520
good but by introducing an overlength in

0:25:31.520,0:25:34.159
aramite they managed to achieve a curve

0:25:34.159,0:25:37.320
like this so basically during the fall

0:25:37.320,0:25:39.760
you probably are not even going to feel

0:25:39.760,0:25:43.840
any difference on this rope no nice and

0:25:43.840,0:25:46.200
why is it hybrid inside why is it not

0:25:46.200,0:25:50.200
all armed it will not um be held in

0:25:50.200,0:25:53.399
position so you need anara because it

0:25:53.399,0:25:55.760
you have the overlength anywhere and if

0:25:55.760,0:25:58.799
you move with the Rope

0:25:58.799,0:26:02.200
the maybe it changes the place that's a

0:26:02.200,0:26:04.679
very smart design now it makes more

0:26:04.679,0:26:08.039
sense how does it come back after load

0:26:08.039,0:26:10.120
cuz otherwise you would stretch and then

0:26:10.120,0:26:12.320
the middle layer would move somewhere

0:26:12.320,0:26:14.559
but since you have some nylon in it it

0:26:14.559,0:26:16.880
will reset the middle layer probably as

0:26:16.880,0:26:20.200
well yes of course mhm now as a fun fact

0:26:20.200,0:26:23.480
this robe has only 4% of its weight in

0:26:23.480,0:26:26.799
aramite so let's see what that does

0:26:26.799,0:26:28.880
ready to Launch

0:26:28.880,0:26:34.600
3 two one go

0:26:35.220,0:26:38.720
[Music]

0:27:04.310,0:27:05.919
[Music]

0:27:05.919,0:27:09.200
who oh but the core it's only hanging on

0:27:09.200,0:27:12.799
the core strands yes middle sheath is

0:27:12.799,0:27:15.159
offering a protective layer so it's not

0:27:15.159,0:27:17.919
like the middle layer is indestructible

0:27:17.919,0:27:20.200
no no of course not a but the core

0:27:20.200,0:27:23.399
strands barely got any damage yeah just

0:27:23.399,0:27:26.120
a tiny bit Yeah so while this middle

0:27:26.120,0:27:28.480
layer was adding extra protection for

0:27:28.480,0:27:32.600
the Rope it was still eventually cut

0:27:32.600,0:27:35.799
right outside of the camera frame

0:27:35.799,0:27:41.440
sorry 3 2 one

0:27:43.159,0:27:45.799
go it's about does it hold in this

0:27:45.799,0:27:48.360
scenario or not mhm so we are kind of

0:27:48.360,0:27:51.000
deducting from this test setup that it

0:27:51.000,0:27:54.320
does perform significantly better than

0:27:54.320,0:27:56.480
normal inline rope with the same

0:27:56.480,0:27:59.760
diameter so if you look in keeping the

0:27:59.760,0:28:03.159
same weight of the rope and same handle

0:28:03.159,0:28:05.360
you will get an extra safety margin on

0:28:05.360,0:28:06.919
top but the thing is something that you

0:28:06.919,0:28:08.600
need to be aware of just because you

0:28:08.600,0:28:11.360
have an extra safety margin doesn't mean

0:28:11.360,0:28:15.600
it will absolutely not break this is

0:28:15.600,0:28:20.480
no so a very interesting design indeed

0:28:20.480,0:28:22.640
and while I'm still waiting for

0:28:22.640,0:28:25.159
completely indestructible middle

0:28:25.159,0:28:27.799
layer there was something that had

0:28:27.799,0:28:30.480
actually even bigger impact on the cut

0:28:30.480,0:28:33.039
resistance so instead of having the Rope

0:28:33.039,0:28:35.399
safely attached to the beam I came up

0:28:35.399,0:28:38.320
with a brilliant idea to attach it to

0:28:38.320,0:28:40.559
myself no I'm I'm curious if it will

0:28:40.559,0:28:43.159
break when I will be L yeah no I think

0:28:43.159,0:28:46.880
um it won't yeah because Dynamics also

0:28:46.880,0:28:49.480
play a big role so but let's say I I

0:28:49.480,0:28:52.640
panic as a bler and I take really hard

0:28:52.640,0:28:55.679
will it break that we will find

0:28:55.679,0:28:59.080
out so let's say

0:28:59.080,0:29:01.960
what I'm afraid is that I will jump and

0:29:01.960,0:29:03.960
I will end up there and then it will

0:29:03.960,0:29:06.720
break and I will fall yeah that would

0:29:06.720,0:29:10.200
suck CIA was nice to meet you H any any

0:29:10.200,0:29:11.880
last

0:29:11.880,0:29:14.000
words

0:29:14.000,0:29:18.519
um for science okay

0:29:18.519,0:29:23.919
ano I see some anxiety sweat PS go okay

0:29:23.919,0:29:29.159
3 2 1

0:29:30.440,0:29:33.080
so my plan was to take during the fall

0:29:33.080,0:29:35.679
and at the same time go down to cause as

0:29:35.679,0:29:38.600
hard catch as possible however since I

0:29:38.600,0:29:41.279
was belaying with a tube raising my hand

0:29:41.279,0:29:44.159
up was causing the Rope to slide through

0:29:44.159,0:29:47.600
the blay device way too much but the

0:29:47.600,0:29:50.360
Rope was still damaged now for the

0:29:50.360,0:29:53.480
second attempt I decided to not take and

0:29:53.480,0:29:57.399
just go down

0:30:01.000,0:30:03.519
okay so for the climber it was a force

0:30:03.519,0:30:04.559
of

0:30:04.559,0:30:08.519
2.98 so almost 3 kons in our previous

0:30:08.519,0:30:10.120
experiments where we had the Rope

0:30:10.120,0:30:12.679
attached to the beam ropes were breaking

0:30:12.679,0:30:15.760
at slightly higher forces so to match

0:30:15.760,0:30:17.960
that since now we have a little bit of

0:30:17.960,0:30:20.480
extra rope we decided to slightly

0:30:20.480,0:30:24.279
increase the fall

0:30:28.279,0:30:31.600
yeah you were too fast then so yeah I've

0:30:31.600,0:30:34.000
heard that dying is against YouTube

0:30:34.000,0:30:37.480
monetization policy especially in front

0:30:37.480,0:30:41.360
of so many cameras so I'm glad I didn't

0:30:41.360,0:30:44.760
but since my timing was meh let's try

0:30:44.760,0:30:48.559
again 2

0:30:49.000,0:30:51.680
1

0:30:51.680,0:30:55.480
[Applause]

0:30:55.480,0:30:58.960
yes I guess my climber did not VI that

0:30:58.960,0:31:01.480
was beautiful B where is my

0:31:01.480,0:31:04.120
climber it actually broke not on the

0:31:04.120,0:31:06.720
first impact I felt like I caught it and

0:31:06.720,0:31:09.880
then it was sliding and then it broke

0:31:09.880,0:31:12.279
and then I had like T and

0:31:12.279,0:31:17.080
P nice okay now we tried the same but I

0:31:17.080,0:31:20.880
will uh delay softly ready

0:31:20.880,0:31:25.559
y three 2 1 now for the soft catch since

0:31:25.559,0:31:27.960
I was belaying with the tube my idea was

0:31:27.960,0:31:31.480
to Simply let the Rope slide through it

0:31:31.480,0:31:35.080
however my timing was Mech again I

0:31:35.080,0:31:39.120
couldn't see the climber okay don't

0:31:41.559,0:31:43.399
judge huh

0:31:43.399,0:31:47.039
nothing that's so cool so first let me

0:31:47.039,0:31:52.279
give you the force 2.3 so 2.3 it's

0:31:52.279,0:31:55.440
really nothing huh it's so chronics

0:31:55.440,0:31:58.480
nothing nothing nothing nothing what not

0:31:58.480,0:32:00.240
even abrasion

0:32:00.240,0:32:04.039
what absolutely

0:32:04.039,0:32:07.480
nothing we the wrong

0:32:07.480,0:32:11.240
side yeah yeah it burned that is crazy

0:32:11.240,0:32:14.360
it just burned a little bit on top but I

0:32:14.360,0:32:16.240
would still climb with this rope yeah

0:32:16.240,0:32:18.960
totally I was almost sure that it will

0:32:18.960,0:32:23.720
not break but I was not expecting to the

0:32:23.720,0:32:26.760
difference to be that drastic yeah all

0:32:26.760,0:32:29.399
right so far we explore the dangers of

0:32:29.399,0:32:32.799
sharp rocks but another massive danger

0:32:32.799,0:32:35.919
comes from sharp climbing equipment this

0:32:35.919,0:32:38.320
is for example in the climbing gym in

0:32:38.320,0:32:40.760
the first caribiner oh the very very

0:32:40.760,0:32:43.039
first quick draw in the gym was sharp

0:32:43.039,0:32:45.840
and it cut somebody's rope mhm the Rope

0:32:45.840,0:32:48.240
went like like this in the Carabiner and

0:32:48.240,0:32:50.639
then up as you can imagine the climbing

0:32:50.639,0:32:53.399
gym and so it sharpened it in a really

0:32:53.399,0:32:56.880
bad way and for many many years maybe uh

0:32:56.880,0:32:58.480
no one Dropped In in the first Quick

0:32:58.480,0:33:01.320
Draw also no one inspected it in the gym

0:33:01.320,0:33:02.639
the person fell into the first Quick

0:33:02.639,0:33:04.760
Draw and then the the Rope ripped so

0:33:04.760,0:33:06.519
what is this test well we're cutting

0:33:06.519,0:33:08.760
ropes once again this time we're

0:33:08.760,0:33:10.600
dropping the ropes over a sharp

0:33:10.600,0:33:13.279
Carabiner it has a very sharp edge

0:33:13.279,0:33:15.320
actually yeah you would

0:33:15.320,0:33:17.639
notice if something like this would be

0:33:17.639,0:33:22.840
out there three two one

0:33:26.480,0:33:30.320
go you have to see this yeah it looks

0:33:30.320,0:33:33.639
again very violent my God that one that

0:33:33.639,0:33:38.039
was not something I was expecting 3 2 1

0:33:38.039,0:33:41.039
go

0:34:01.360,0:34:04.600
I think Bing it is oh it's so scary how

0:34:04.600,0:34:07.720
it goes like for like 2 3 seconds goes

0:34:07.720,0:34:11.520
zoom and then just boms it explodes now

0:34:11.520,0:34:13.960
assuming the Rope would not fail this

0:34:13.960,0:34:16.919
test was set to produce around 3 and A2

0:34:16.919,0:34:20.440
ktons to the climber so again imitating

0:34:20.440,0:34:23.079
real life

0:34:25.280,0:34:27.679
scenarios oh my God that happened

0:34:27.679,0:34:30.520
happens so fast it's not getting any

0:34:30.520,0:34:32.720
better right still

0:34:32.720,0:34:35.359
terrifying is it for you yeah it's

0:34:35.359,0:34:38.440
shocking honestly like it it's such a

0:34:38.440,0:34:40.159
violent

0:34:40.159,0:34:43.520
explosion horrible gives me nightmares

0:34:43.520,0:34:47.280
and 9.8 we

0:34:48.919,0:34:54.280
go wow the Rope uh it survived but it's

0:34:54.280,0:34:56.079
uh yeah it's pretty

0:34:56.079,0:34:59.079
damaged I want to show you something

0:34:59.079,0:35:01.000
because of this

0:35:01.000,0:35:03.560
impact you create so much

0:35:03.560,0:35:07.040
friction that actually this is like a

0:35:07.040,0:35:09.839
part that melted it's like a little cap

0:35:09.839,0:35:14.760
so this thing melted on the Carabiner

0:35:14.760,0:35:16.320
and then the rest of the Rope was just

0:35:16.320,0:35:18.880
going over it so it kind of created a

0:35:18.880,0:35:22.440
protective uh piece of material that the

0:35:22.440,0:35:24.880
rest of the Rope was sliding over this

0:35:24.880,0:35:28.079
rope we know that it can break but but

0:35:28.079,0:35:29.680
sometimes it can also hold so it's like

0:35:29.680,0:35:32.359
a little bit of a

0:35:34.880,0:35:38.050
[Music]

0:35:40.960,0:35:47.450
gamble all right next 10.2 mm monster

0:35:47.450,0:35:51.510
[Music]

0:35:54.079,0:35:58.079
rope so yeah sometimes more is better

0:35:58.079,0:36:00.160
but in case you want

0:36:00.160,0:36:04.760
less here is a new construction

0:36:14.359,0:36:17.079
rope first it cut through the outer shf

0:36:17.079,0:36:20.079
it failed here but the sharp edge was

0:36:20.079,0:36:23.480
traveling along the longitudinal side of

0:36:23.480,0:36:29.040
the rope and kept on damaging but there

0:36:29.040,0:36:31.359
um the middle Chef was protecting the co

0:36:31.359,0:36:35.000
strand so this was good the craziest

0:36:35.000,0:36:37.599
thing that this is this is fabric this

0:36:37.599,0:36:41.319
is textile mhm and we are falling on it

0:36:41.319,0:36:44.520
and it's holding and comes back like

0:36:44.520,0:36:46.319
this coming back is always the most

0:36:46.319,0:36:48.280
fascinating thing for me if you load it

0:36:48.280,0:36:50.040
and you put it on the table and you see

0:36:50.040,0:36:53.480
it shrinking back slowly it lives H you

0:36:53.480,0:36:55.160
should name your rope you can write a

0:36:55.160,0:36:58.640
comment what name you give to your rope

0:36:58.640,0:37:00.720
we're curious the name with the most up

0:37:00.720,0:37:04.839
votes will get a free rope from

0:37:05.880,0:37:10.160
mammut is that the case that' be cool

0:37:10.160,0:37:12.359
let just's make that happen okay yeah

0:37:12.359,0:37:13.839
that's that's

0:37:13.839,0:37:17.160
that so for whom is this

0:37:17.160,0:37:20.839
rope for a sailor for sailor a nice

0:37:20.839,0:37:21.760
wooden

0:37:21.760,0:37:25.240
boat yeah it matches

0:37:25.240,0:37:27.760
then ah we are talking not about this

0:37:27.760,0:37:30.680
we're talking about this rope so should

0:37:30.680,0:37:33.040
I buy this rope for going to the cracks

0:37:33.040,0:37:36.440
or it has a different intent for whom

0:37:36.440,0:37:39.200
this rope is actually mountaineering

0:37:39.200,0:37:41.520
Ridge climbing multi-pitch climbing

0:37:41.520,0:37:43.680
where yeah there are a lot of sharp

0:37:43.680,0:37:45.760
edges also maybe ice climbing is where

0:37:45.760,0:37:49.440
you maneuver with a lot of Sharp Tools

0:37:49.440,0:37:52.079
already single pitch climbing yeah sport

0:37:52.079,0:37:54.200
climbing Trad climbing do you really

0:37:54.200,0:37:56.319
need it I would say hey it depends on

0:37:56.319,0:38:00.359
the route why wouldn't I want this in a

0:38:00.359,0:38:04.680
crack will it last less long is it less

0:38:04.680,0:38:07.359
durable since the sheath is you said a

0:38:07.359,0:38:10.680
little bit thinner yeah so you have a

0:38:10.680,0:38:13.240
little bit less uh sheath since we had

0:38:13.240,0:38:16.480
to make room for the aramid uh shf did

0:38:16.480,0:38:18.359
you run this through your abrasion

0:38:18.359,0:38:21.160
testing machine yes we saw a decrease

0:38:21.160,0:38:22.560
but you know in German we have the

0:38:22.560,0:38:26.720
saying that you want theing Theo so you

0:38:26.720,0:38:28.359
want

0:38:28.359,0:38:32.640
and a a pig that has wool and is also

0:38:32.640,0:38:36.560
laying eggs so you want you want an a

0:38:36.560,0:38:40.720
all overall package that does not exist

0:38:40.720,0:38:42.400
so this is kind of the thing with robes

0:38:42.400,0:38:44.640
you can't have it all at once so that

0:38:44.640,0:38:47.200
was a journey which makes me really

0:38:47.200,0:38:50.400
curious to see what's coming next and

0:38:50.400,0:38:52.359
what rope names you going to put down in

0:38:52.359,0:38:55.560
the comments and also making this video

0:38:55.560,0:38:58.720
took me over 3 months many locations and

0:38:58.720,0:39:01.040
many smart humans helping

0:39:01.040,0:39:04.480
me so probably not the best strategy for

0:39:04.480,0:39:07.520
a successful YouTube business and it

0:39:07.520,0:39:09.960
would definitely not be possible without

0:39:09.960,0:39:13.000
kind people supporting me on my patreon

0:39:13.000,0:39:14.800
and in other

0:39:14.800,0:39:19.119
means so I send a lot of low gravity

0:39:19.119,0:39:22.400
days to these kind of people these kind

0:39:22.400,0:39:25.760
of kind people and thank you for

0:39:25.760,0:39:27.560
watching and see you in the next next

0:39:27.560,0:39:29.920
one